http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56752
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2013-03-27 11:00:16 UTC --- How do you propose to check that? You might not have a 32-bit compiler with which to test those headers during configuration, so it's not easy to test them until after we've bootstrapped a multilib compiler.
